linux-toradex.git/kernel/irq/Makefile, branch v4.4.93

genirq: Introduce generic irq migration for cpu hotunplug

2015-10-01T12:51:15+00:00

ARM and ARM64 have almost identical code for migrating interrupts on
cpu hotunplug. Provide a generic version which can be used by both.

The new code addresses a shortcoming in the ARM[64] variants which
fails to update the affinity change in some cases. The solution for
this is to use the core function irq_do_set_affinity() instead of open
coding it.

[ tglx: Added copyright notice and license boilerplate. Rewrote
  	subject and changelog. ]

Signed-off-by: Yang Yingliang 
Acked-by: Russell King - ARM Linux 
Cc: Jiang Liu 
Cc: Marc Zyngier 
Cc: Mark Rutland 
Cc: Will Deacon 
Cc: Hanjun Guo 
Cc: 
Link: http://lkml.kernel.org/r/1443087135-17044-2-git-send-email-yangyingliang@huawei.com
Signed-off-by: Thomas Gleixner

genirq: Add generic msi irq domain support

2014-11-23T12:01:47+00:00

Implement the basic functions for MSI interrupt support with
hierarchical interrupt domains.

[ tglx: Extracted and combined from several patches ]

Signed-off-by: Jiang Liu 
Cc: Bjorn Helgaas 
Cc: Grant Likely 
Cc: Marc Zyngier 
Cc: Yingjoe Chen 
Cc: Yijing Wang 
Signed-off-by: Thomas Gleixner

irq: add irq_domain translation infrastructure

2011-07-28T07:32:04+00:00

This patch adds irq_domain infrastructure for translating from
hardware irq numbers to linux irqs.  This is particularly important
for architectures adding device tree support because the current
implementation (excluding PowerPC and SPARC) cannot handle
translation for more than a single interrupt controller.  irq_domain
supports device tree translation for any number of interrupt
controllers.

This patch converts x86, Microblaze, ARM and MIPS to use irq_domain
for device tree irq translation.  x86 is untested beyond compiling it,
irq_domain is enabled for MIPS and Microblaze, but the old behaviour is
preserved until the core code is modified to actually register an
irq_domain yet.  On ARM it works and is required for much of the new
ARM device tree board support.

PowerPC has /not/ been converted to use this new infrastructure.  It
is still missing some features before it can replace the virq
infrastructure already in powerpc (see documentation on
irq_domain_map/unmap for details).  Followup patches will add the
missing pieces and migrate PowerPC to use irq_domain.

SPARC has its own method of managing interrupts from the device tree
and is unaffected by this change.

Acked-by: Ralf Baechle 
Signed-off-by: Grant Likely

genirq: Make generic irq chip depend on CONFIG_GENERIC_IRQ_CHIP

2011-05-02T16:16:22+00:00

Only compile it in when there are users.

Signed-off-by: Thomas Gleixner 
Cc: linux-arm-kernel@lists.infradead.org

genirq: Implement a generic interrupt chip

2011-04-23T13:56:24+00:00

Implement a generic interrupt chip, which is configurable and is able
to handle the most common irq chip implementations.

Signed-off-by: Thomas Gleixner 
Cc: linux-arm-kernel@lists.infradead.org
Tested-by: H Hartley Sweeten 
Tested-by: Tony Lindgren 
Tested-by; Kevin Hilman

genirq: Remove the now unused sparse irq leftovers

2010-10-12T14:53:44+00:00

The move_irq_desc() function was only used due to the problem that the
allocator did not free the old descriptors. So the descriptors had to
be moved in create_irq_nr(). That's history.

The code would have never been able to move active interrupt
descriptors on affinity settings. That can be done in a completely
different way w/o all this horror.

Remove all of it.

Signed-off-by: Thomas Gleixner 
Reviewed-by: Ingo Molnar

genirq: Distangle kernel/irq/handle.c

2010-10-12T14:39:05+00:00

kernel/irq/handle.c has become a dumpground for random code in random
order. Split out the irq descriptor management and the dummy irq_chip
implementation into separate files. Cleanup the include maze while at
it.

No code change.

Signed-off-by: Thomas Gleixner 
Reviewed-by: Ingo Molnar

x86/irq: use move_irq_desc() in create_irq_nr()

2009-05-01T17:01:12+00:00

move_irq_desc() will try to move irq_desc to the home node if
the allocated one is not correct, in create_irq_nr().

( This can happen on devices that are on different nodes that
  are using MSI, when drivers are loaded and unloaded randomly. )

v2: fix non-smp build
v3: add NUMA_IRQ_DESC to eliminate #ifdefs

[ Impact: improve irq descriptor locality on NUMA systems ]

Signed-off-by: Yinghai Lu 
Cc: Andrew Morton 
Cc: Suresh Siddha 
Cc: "Eric W. Biederman" 
Cc: Rusty Russell 
LKML-Reference: <49F95EAE.2050903@kernel.org>
Signed-off-by: Ingo Molnar

x86/irq: remove leftover code from NUMA_MIGRATE_IRQ_DESC

2009-04-28T10:21:15+00:00

The original feature of migrating irq_desc dynamic was too fragile
and was causing problems: it caused crashes on systems with lots of
cards with MSI-X when user-space irq-balancer was enabled.

We now have new patches that create irq_desc according to device
numa node. This patch removes the leftover bits of the dynamic balancer.

[ Impact: remove dead code ]

Signed-off-by: Yinghai Lu 
Cc: Andrew Morton 
Cc: Suresh Siddha 
Cc: "Eric W. Biederman" 
Cc: Rusty Russell 
LKML-Reference: <49F654AF.8000808@kernel.org>
Signed-off-by: Ingo Molnar

PM: Introduce functions for suspending and resuming device interrupts

2009-03-30T19:46:54+00:00

Introduce helper functions allowing us to prevent device drivers from
getting any interrupts (without disabling interrupts on the CPU)
during suspend (or hibernation) and to make them start to receive
interrupts again during the subsequent resume.  These functions make it
possible to keep timer interrupts enabled while the "late" suspend and
"early" resume callbacks provided by device drivers are being
executed.  In turn, this allows device drivers' "late" suspend and
"early" resume callbacks to sleep, execute ACPI callbacks etc.

The functions introduced here will be used to rework the handling of
interrupts during suspend (hibernation) and resume.  Namely,
interrupts will only be disabled on the CPU right before suspending
sysdevs, while device drivers will be prevented from receiving
interrupts, with the help of the new helper function, before their
"late" suspend callbacks run (and analogously during resume).

Signed-off-by: Rafael J. Wysocki 
Acked-by: Ingo Molnar